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#
# Copyright (C) 2005-2010 Junjiro R. Okajima
#
# This program, aufs is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# library functions for aufs shell scripts
# path in canonical representation
SetDir() # var dir
{
cd "$2"
eval "$1=\"$PWD\""
cd "$OLDPWD"
}
# escape the unprintable characters, mainly for grep-ping /proc/mounts
Esc() # [-e]
{
sed -r -e '
s/\\/\\134/g
s/$/\\012/
' |
tr -d '\n' |
sed -r -e '
s/ /\\040/g
s/\t/\\011/g
s/\r/\\015/g
s/\\012$//
' |
{ test $# -eq 1 &&
test "$1" = "-e" &&
sed -r -e 's/\\/\\\\/g' ||
cat; }
echo
}
# find a mount-entry by its mount-point
FindMntEnt() # mntpnt
{
proc_mounts=/proc/self/mounts
test ! -e $proc_mounts && proc_mounts=/proc/$$/mounts
test ! -e $proc_mounts && proc_mounts=/proc/mounts
fgrep \ $(echo "$1" | Esc)\ aufs\ $proc_mounts |
tail -n 1
}
# current mount options
MntOpts() # mntpnt
{
FindMntEnt "$1" |
cut -f4 -d' '
}
########################################
AuDebug() # 1 | 0 [sec]
{
test $1 -eq 0 && set +x
aufs_debug=/sys/module/aufs/parameters/debug
if [ -f $aufs_debug ]
then
echo $1 | sudo dd of=$aufs_debug 2> /dev/null
test $# -eq 2 && sleep $2
fi
test $1 -eq 1 && set -x
true
}
# Local variables: ;
# mode: text;
# End: ;
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